Influence of exhaust gas recirculation on technical, economic, and environmental performance of high-uprated diesel aircraft engine

Гуреев, В. М.; Khairullin, A. Kh.; Varlamov, F. A.; Gumerov, I. F.; Khafizov, R. Kh.

doi:10.3103/s1068799816040188

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…In general, algebraic formulas for calculating grids are obtained by applying interpolation over curves or surfaces. The order of interpolation accuracy can be increased either by increasing the number of surfaces used for interpolation, or by increasing the amount of information about the function being interpolated by specifying a larger number of derivatives on the surfaces [7,8].…”

Section: Resultsmentioning

confidence: 99%

Generating a computational grid when modeling the intake system of a tractor diesel engine to reduce the impact on the environment

Zholobov

Pasin

Novozhilov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The processes in the intake system of agricultural tractor diesel internal combustion engines (TDICE) have a spatial and non-stationary character, accompanied by heat exchange and energy dissipation. The complex configuration of the exhaust system elements, which is also determined by the existing dimensional restrictions, leads to the fact that it is not possible to talk about any orderly flow in these areas. Due to such a complex nature, a detailed study of the flow parameters even for one modification of the exhaust system on a working TDICE is associated with significant time and money. If we take into account that in order to reduce the environmental impact, it is necessary to find a more optimal form, and for this it is necessary to test several different configurations of intake systems, then it becomes clear that researchers want to simplify the task in some way in order to obtain a positive effect by spending less money and time. And here it becomes indispensable to use physical models that more or less correspond to the parameters of the intake systems of the prototype TDICE.

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Section: Resultsmentioning

confidence: 99%

Generating a computational grid when modeling the intake system of a tractor diesel engine to reduce the impact on the environment

Zholobov

Pasin

Novozhilov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Providing for environmental indicators in operation of a diesel engine is associated with power-related and economic parameters of engine operation [42]. Beneficial effects of EGR system on NO х emissions is accompanied at the same time by reduction of brake power and increase of SFOC.…”

Section: Discussion / Diskusijamentioning

confidence: 99%

Exhaust Gas Recirculation as a Major Technique Designed to Reduce NOх Emissions from Marine Diesel Engines

Kuropyatnyk¹,

Sagin²

2019

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The study objective is to identify to what extent the recirculation of exhaust gas from a low-speed marine diesel engine affects environmental, economic and power-related parameters in engine operation. Concentration of nitrogen oxides in exhaust gases was assumed to be the environmental parameter of an engine, specific fuel consumption as its economic parameter while effective (brake) power as its power-related parameter. Content of nitrogen oxides in exhaust gases discharged by low-speed marine diesel engines shall remain within the range of 3.4…14.4 g/(kW•h) depending on the area of marine vessel operation as specified by requirements of Annex VI MARPOL. Exhaust gas recirculation (EGR) was reviewed as a way to provide for such values. It was proven experimentally that recirculation of exhaust gas in the range of 4.7…18.8 % provides for reduction in concentration of nitrogen oxide (NO х) in the exhaust gases respectively down to 13.3…3.3 g NO x /(kW•h) depending on the rotation speed and load of diesel engine. Drop of NO х concentration in exhaust gases (as compared to NO х concentration without any circulation system used) was shown to reach 37.9…53.5%. It is proposed to apply the EGR system as a major technique to reduce NO х-emissions and bring the aforesaid parameter in compliance with requirements of international agencies. Sažetak Cilj studije je identificirati: "Do koje mjere ponovno strujanje ispušnoga plina iz sporohodnog dizelskog stroja, utječe na okolišne, ekonomske i energetske parametre pri radu stroja?" Koncentracija nitrogen oksida pri ispušnim plinovima, smatra se energetskim parametrom stroja, a specifična potrošnja goriva, kao ekonomski parametar, dok je učinkovita (konjska) snaga energetski parametar. Sadržaj nitrogen oksida pri ispušnim plinovima koje ispušta sporohodni brodski dizelski stroj, ostat će unutar dometa od 3.4…14.4g/(kW•h) ovisno o području djelovanja broda na moru, kako je specificirano zahtjevima Annexa MARPOL Konvencije Ponovno strujanje plina (EGR) odabrano je za dokazivanje tih vrijednosti. Eksperimentalno je dokazano da ponovno strujanje ispušnoga plina u dometu od 4.7…18.8% osigurava smanjenje koncentracije nitrogen oksida (NO x) pri ispušnim plinovima, prema redosljedu navođenja sve do 13.3…3.3 g NO x /kW•h ovisno o rotacionoj brzini i opterećenju dizelskoga stroja. Pad koncentracije pri ispušnim plinovima (u usporedbi s NO x) koncentracijom bez ikakva sustava cirkulacije dostigao je 37.9…53.5%. Predlaže se da se primijeni EGR sustav kao glavna tehnika smanjenja NO x emisija i da se dovede spomenuti parametar u skladu sa zahtjevima međunarodnih agencija. KEY WORDS low-speed marine diesel engine environmental indicators of diesel engine operation concentration of nitrogen oxides in exhaust gases exhaust gas recirculation (EGR) system brake power specific fuel oil consumption KLJUČNE RIJEČI sporohodni dizelski motor okolišni pokazatelji djelovanja dizelskoga stroja koncentracija nitrogen oksida pri ispušnim plinovima sustav ponovnoga strujanja plina konjska snaga specifič...

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“…The operation process, taking part into the sea and river ships' engines, is in tight connection with the process of charge air and exhaust gas. To adjust the operation process in the combustion chamber and the quantity of air, supplied by the TC compressor side, the following measures of automatic regulation are applied: -by-pass a part of exhaust gas besides turbine [37]; -the turn of blades of turbine [38]; -the changes of open fl ow area at turbine entrance [39].…”

Section: Literature Review / Pregled Literaturementioning

confidence: 99%

Supplying of Marine Diesel Engine Ecological Parameters

Sagin¹,

Kuropyatnyk²,

Zablotskyi³

et al. 2022

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The by-pass system of exhaust gas for the engine 6L20 Wartsila has been observed. The requirements of Annex VI MARPOL towards nitrogen oxide concentration in ship engine exhaust gases have been provided. The purpose of research was the determination of diesel 6L20 Wartsila by-pass exhaust gases optimum volume – at this the nitrogen oxide minimal concentration in exhaust gases is assured, the minimal increase (comparing with operation mode without by-pass) – specific effective fuel consumption, supporting of necessary thermal factor diapason of engine cylinders. The research was performed for the exhaust gas by-pass diapason 0…10 % with engine load diapason 0.55…0.85 % from nominal power. Upon experimental results it has been stated that the exhaust gas by-pass usage favors the ecological parameters of ships engine operation modes – by this at the range of exploitation load 0.55…0.85 % from nominal power the nitrogen oxide concentration in exhaust gas is decreased to 1.32….12.97 %. The exhaust gas by-pass impairs the combustion process and favors the increasing of specific effective fuel consumption and increasing the temperature of exhaust gases. The exhaust gas by-pass system effectiveness assessment should be performed by complex estimation of the following engine operation parameters: the nitrogen oxide concentration in exhaust gas, increasing of specific effective fuel consumption(SFOC), the exhaust gas temperature. As optimal degree of exhaust gas by-pass value when the maximum decrease of nitrogen oxide emission at minimal increase of fuel consumption and simultaneous engine thermal factor handling has to be considered.

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Influence of exhaust gas recirculation on technical, economic, and environmental performance of high-uprated diesel aircraft engine

Cited by 16 publications

References 2 publications

Generating a computational grid when modeling the intake system of a tractor diesel engine to reduce the impact on the environment

Generating a computational grid when modeling the intake system of a tractor diesel engine to reduce the impact on the environment

Exhaust Gas Recirculation as a Major Technique Designed to Reduce NOх Emissions from Marine Diesel Engines

Supplying of Marine Diesel Engine Ecological Parameters

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